312118 has 4 divisors (see below), whose sum is σ = 468180. Its totient is φ = 156058.

The previous prime is 312107. The next prime is 312121. The reversal of 312118 is 811213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811213 = 13 ⋅62401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78028 + ... + 78031.

It is an arithmetic number, because the mean of its divisors is an integer number (117045).

2³¹²¹¹⁸ is an apocalyptic number.

312118 is a deficient number, since it is larger than the sum of its proper divisors (156062).

312118 is a wasteful number, since it uses less digits than its factorization.

312118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156061.

The product of its digits is 48, while the sum is 16.

The square root of 312118 is about 558.6752187094. The cubic root of 312118 is about 67.8327782730.

It can be divided in two parts, 3 and 12118, that added together give a palindrome (12121).

The spelling of 312118 in words is "three hundred twelve thousand, one hundred eighteen".